The efficiency of the right catalytic converter is insufficient. (function chain) (P0422)

P0422
The efficiency of the right catalytic converter is insufficient. (function chain) (P0422)
Possible cause:
­ Catalytic converter of right cylinder bank
Affected functions:
­
­
Engine diagnosis
Exhaust system
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Test 1: Check component G3/4 (Right O2 sensor, before TWC [KAT]).
Test 2: Check component G3/6 (Right O2 sensor, after TWC [KAT]).
1. Check component G3/4 (Right O2 sensor, before TWC [KAT]).
Warning!Communication with ECU required.
2. Check component G3/6 (Right O2 sensor, after TWC [KAT]).
Warning!Communication with ECU required.